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采用LS-DYNA非线性有限元软件对Ti/Al3Ti金属间化合物基层状复合材料靶板的弹道侵彻过程进行了数值模拟。考察了等厚度下Ti体积分数、层数和材料梯度分布对复合材料抗侵彻性能的影响。结果表明,Ti体积分数约为20%时,靶板的抗侵彻性能最好。随着层数的增加,复合材料靶板的抗侵彻性能逐渐增强;但超过25层后,靶板的抗侵彻性能逐渐趋于稳定。不同铺层结构功能梯度板的抗侵彻性能相差较大,正向铺层梯度板的抗侵彻性能明显优于等厚均质复合材料靶板。
The LS-DYNA nonlinear finite element software was used to simulate the process of ballistic penetration of Ti / Al3Ti intermetallic compound layered composite target. The effects of Ti volume fraction, layer number and material gradient distribution on the anti-penetration performance of the composites were investigated. The results show that the anti-penetration performance of the target plate is best when Ti volume fraction is about 20%. With the increase of the number of layers, the anti-penetration performance of the composite target plate gradually increased; but after more than 25 layers, the anti-penetration performance of the target plate gradually stabilized. The anti-penetration performance of the functionally graded plates with different lamination structures is quite different. The anti-penetration performance of the positive pavement gradient plates is obviously better than that of the homogeneous-thickness composite targets.